feat: Force beta=true parameter for Anthropic channel

[MUTED64]

WHY

部分 Claude 中转商对请求路径有策略差异，需要显式携带 ?beta=true 才能放行，目前 new-api 缺少按渠道强制 beta query 的配置能力，因此在渠道配置种提供可控开关，在管理后台可配置是否强制追加 ?beta=true。

WHAT

1. 后端支持渠道配置中指定 beta=true

• 在 ChannelOtherSettings 新增字段：claude_beta_query: boolean
• Claude Relay 判定逻辑更新：请求携带 beta=true 或 渠道配置 claude_beta_query=true 时，启用 IsClaudeBetaQuery

2. 前端管理页新增配置开关

• 在渠道编辑页（Claude 渠道），“渠道额外设置”部分新增开关：
  • Claude 强制 beta=true
• 语义上将该开关放在“渠道额外设置”区域，避免与“字段透传控制”混淆。

测试与验证

已完成以下验证，功能通过：

1. 后端构建与测试

• go test ./relay/common ./dto 通过
• go build ./... 通过

2. 前端构建

• bun run build 通过（生成 web/dist）

3. 功能验证

• Claude 渠道开启 Claude 强制 beta=true 后，即使客户端不传 ?beta=true，请求也能按预期走 beta query 链路；
• 保持向后兼容：客户端显式传 ?beta=true 仍生效；
• 未开启开关的渠道行为不变。

Summary by CodeRabbit

• New Features
  • Added a Claude beta query toggle to Claude channel configuration settings
  • New setting in the channel modal to enable forced beta mode for Claude API requests

[coderabbitai]

Walkthrough

This pull request adds a new Claude beta query forcing feature by introducing a ClaudeBetaQuery boolean field to channel settings, implementing a backend check that forces Claude requests to use beta when enabled, and adding frontend UI controls to toggle this setting for Claude channels.

Changes

Cohort / File(s)	Summary
Data Transfer Object dto/channel_settings.go	Added ClaudeBetaQuery boolean field to ChannelOtherSettings struct with JSON serialization support for the new setting.
Relay Logic relay/common/relay_info.go	Modified Claude beta query detection to check both HTTP query parameters and a new isClaudeBetaForced() helper function that reads the ClaudeBetaQuery setting from context, centralizing the force-beta decision logic.
Frontend UI web/src/components/table/channels/modals/EditChannelModal.jsx	Added UI switch in Channel Extra Settings for Claude channels to toggle the claude_beta_query setting, with data binding to parse and persist the setting through the channel configuration workflow.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A whisker-twitching cheer for Claude's new mode,
Where beta queries flow down the code-hopping road,
A toggle, a check, a setting so fine,
The channels now shimmer with freshly-wired shine! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat: Force beta=true parameter for Anthropic channel' clearly describes the main change: adding functionality to force a beta query parameter for Anthropic (Claude) channels, which is the core purpose of all three modified files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[ttimasdf]

IsClaudeBetaQuery 在渠道测试请求里不生效，请问这是预期行为吗？

edit: 感觉是bug，新增 issue #3305